Matsuoka Yōsuke. Sono Ningen to Gaikō by Miwa KimitadaAkira IriyeMN 28:1 (1973) pp. 117–19 → jstor.org/stable/2383944ShareJacob Meckel. Sein Leben, sein Wirken in Deutschland und Japan by Georg KerstKūkai: Major Works. Translated, with an Account of his Life and a Study of his Thought by Yoshito S. Hakeda